Take-up mechanism for knitting machines



Apr. s', 1923.4 145mg@ R. FISHER ,.TAKE-UP MECHANISM FOR KNITTING MACHINES Filed 0015551, 1921 f ATTORNEYS.

Patented pr. `3, 1923.

taaie@ RAYMOND FISHER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF T OSCAR W. WEISEL, OF PHILADELPHIA, PENNSYLVANIA.

TAKE-UP MECHANISM FOR KNIT'IING MACHINES.

Application filed October 31, 1921.

To all fr0/wm t may concern.' Be it known that I, RAYMOND FISHER,

a citizen of the United States, residing at Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented certain new and useful Improvements in Take- Up Mechanisms for Knitting Machines, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to take up mechanisms such as used in connection with knitting machines in drawing upon the knitted fabric in the course of production of the latter by the knitting elements.

The primary object of my invention is to insure the maintenance of the proper tension upon the fabric to the preclusion of any abnormal strains likely to result in ruptures such as have frequently attended the use of take ups heretofore existent.

. Other objects and advantages will become readily apparent from the detailed description of a typical embodiment of my invention which follows.

In the drawings, Fig. I is an elevation of a portion of a circular knitting machine showing a take up mechanism conveniently embodying my invention; and

Fig. II is a plan sectional view of the same.

In the structure herein represented I have shown the take up mechanism of my invention as incorporated with the fabric receiver of the knitting machine which receiver is comprehensively indicated by the numeral 1 Said receiver is supported from beneath by a fixed bracket 2 in such manner as to be rotatable with the needle cylinder (not shown) of the machine, and has an enlarged bottom portion or storage compartment 3 which is approached through a coaxial neck 4 of comparatively smaller diameter. The compartment 3 of the receiver is accessible through openings 5, 5 through which the accumulated fabric may be withdrawn from time to time.

In the interval between the portion 3 and the neck 4, the fabric receiver affords bearing for a pair of draft rollers 6. 7 preferably of hard rubber. Springs 8, 8 (Fig. II) effective against the shaft 9 of the roller 7, serve to press the latter yieldingly toward its fellow so that the fabric F is firmly engaged between the two. The rollers 6, 7 are inter- Serial No. 511,648.

geared as at 10 for positive rotation and are driven by a disk 11 through an interposed worm couple comprising the worm l2 and the worm wheel 13 the latter being directly secured to the shaft 14 of the roller 6.

In the course of each rotation of the receiver, the disk engages a flexible element 15, of leather or other suitable material, spanned at a tangent between two fixed points or portions of the machine frame, in the present instance the supporting legs 16, 17. A spring 18 extending from an anchorage lug 19 on the leg 17 and attached to one end of the element 15, is functional in maintaining the latter taut, and in order that the tension of the spring may be regulated, the metallic plate 20 to which the opposite end of the element is attached is secured with provision for longitudinal adjustment to the leg 16 by screws 21. As the disk 11 intermittently engages against the element 15, the motion induced is transmit-ted through the wormgear couple 12-13 to` the draft rollers 6, 7 with the result that the fabric F is constantly drawn downward, the tension maintained thereon being determined by the regulation of the spring 18 through which the effectiveness of the frictional Contact between the element and the disk is governed. With the proper adjustment of the spring 18, it will be readily` perceived that undue stretching of the fabric, such as would be likely to cause rupture, cannot take place by virtue of the capacity of the disk 11 to slip idly along the element 15.

Having thus described my invention, I claim:

l. A fabric take-up mechanism for knitting machines comprising a draft means for engaging the knitted fabric, and means for operating the draft means including a whirling element. a cooperating means engageable directly in a uniformly intermittent manner by rolling contact with said whirling element and means for transmitting motion of the whirling element to the draft means.

2. A fabric take-up mechanism for knitting machines, comprising a draft means for engaging the knitted fabric, and a yielding drive for the draft means including a rotatable element and means for rotating said rotatable element through direct uniformly intermittent frictional rolling contact between the rotatable element and said voo IDO

rotating means, whereby slippage may occur between the rotatable element and'rotating means when the draft on the fabric becomes excessive.

3. A fabric take up mechanism for knitting machines comprising adraft roller for engaging the knitted fabric; and a yielding drive for the roller including a disk, and a flexible member for rotating said disk through intermittent rolling contact therewith.

4L. fabric take up mechanism for knitting'machines comprising a draft roller for engaging the knitted fabric; and a yieldingdrive for the roller including a disk, and a flexible member for rotating said disk through intermittent rolling contact therewith, and means whereby the tension of the flexible element may be adjusted to vary the effectiveness of the frictional contact with the disk.

5. A fabric take up mechanism for knitting machines comprising a draft roller for engaging the knitted fabric; and a yielding drive for the roller including a disk, and a flexible member for rotating said disk through intermittent rolling contact therewith,a spring for maintaining the flexible element taut, and means whereby the tension of the spring may be adjusted to vary the effectiveness of the frictional contact between tlie'element and the disk. Y

6. A fabricr take up mechanism for knitting machines comprising a draft roller for engaging the knitted fabric and a yielding drive for the roller including a worm gear couple, an associated drive disk, and means for rotating said diskthrough direct intermittent rolling contact between the disk and rotating means.

"7. A fabric take up mechanism for circular knitting machines comprising a draft roller for engaging the knitted fabric, and

a driving disk therefor bodily movable together with the needle cylinder of the machine; and yieldable stationary means located in the path of the aforesaid disk for rotating the disk through direct rolling contact between the disk and stationary means.

8. A fabric take up mechanism for circular knitting machines comprising a pair of cooperative, intergeared draft 'rollers for engaging the knitted fabric; and a yielding drive for the roller including a worm gear couple, and an associated drive disk all bodily movable with the needle cylinder of the knitting machine; in combination with a flexible element located in the path of the aforesaid disk for rotating the disk through intermittent rolling contact therewith, said velement being` spanned between two fixed' points on the frame of the knitting machine, with provisions whereby its tension may be adjusted to vary the effectiveness of thev frictional contact with the disk.

9. A fabric take-up mechanism for knitting machines comprising a draft means for engaging the knitted fabric, and a yielding operating means including a whirling element adapted also for curvilinear motion, and a yielding element located so as to be grazed by the whirling element intermittently during curvilinear motion of the latter and whirled as a consequence of the grazing contact, and means for transmitting whirling motion of the element to the draft means.

In testimony whereof, I have hereunto signed my name at Philadelphia, Pennsyl- Vania, this twenty seventh day of October, 1921.

RAYMOND FISHER.

lVitnesses:

OsoAn W. VVEISEL, J. lVieron KULP. 

